Check Valve Application
Check valves prevent reversal of flow through pipe lines. Derval Swing Check valves can be installed in horizontal or vertical with upward flow. Piston Check valves can be installed into pipeline in any position. They are widely used for water, saturated steam, air, gas, oil and crude oil products. Operating parameters are in accordance with ASME B16.34 standard.
Check Valve Installation
Swing check valves can be installed either horizontally or vertically. If installed vertically, disc must be in upper position and flow direction must be upwards (under disc). Piston Check valves can be installed into pipeline in any position. The high-quality Derval valves are installed in a large variety of services in the Oil & Gas field, Chemical and Petrochemical industry, in On-shore and Off-shore drilling/refining, Power Generation and Water and Waste Treatment industries.